aperture

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“
The ceremony being over, the aperture was again covered with the stone, and the company returned.

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Definitions (18)

Toggle American Heritage definitions American Heritage Dictionary (4)

  1. noun An opening, such as a hole, gap, or slit.
  2. noun A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
  3. noun The diameter of such an opening, often expressed as an f-number.
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Examples (50)

  • It led him into the square opening which he had first glimpsed from the air Beyond the aperture was a stone room, in the center of which a camp fire burned fitfully. —  006 - The Red Skull
  • This device corrects presbyopia by using principles similar to the aperture or opening through which light enters a camera - the smaller the aperture, the greater the range of what you see in focus. —  Next Big Future
  • The more tightly the aperture is allowed to close, the LESS light will enter the camera. —  xml's Blinklist.com
  • This lens is 60mm macro lens, which means you go up really close to the subject without it being out of focus and it also allows you to set a very wide aperture which is what causes the background to blur. —  mirrormirror
  • GMS2 consists of a large-aperture, a midwave infrared sensor, two image-intensified television cameras, a near-infrared laser pointer, and a laser designator / rangefinder (with eyesafe mode). —  WebWire | Recent Headlines
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Related

Roget's II Roget's II: The New Thesaurus

Allen's Allen's Synonyms and Antonyms

Used in the same context Used in the Same Context

opening ·  orifice ·  slit ·  fissure ·  gash ·  diameter ·  archway ·  lens ·  cavity ·  pane ·  shutter ·  crater
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary. Copyright © 2003, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Middle English, from Latin apertūra, from apertus, past participle of aperīre, to open; see wer-4 in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. from Latin apertura, an opening, from apertus, past participle of aperire, open: see apert and aperient.
 

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/ˈæpərtʃjur/
by American Heritage

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